A Single-Arm, Open-Label Phase 2 Pilot Study of Vyxeos (CPX-351) in Adults with Relapsed or Refractory Acute Lymphoblastic Leukemia

Abstract Introduction: Vyxeos® is a liposomal formulation employing a 1:5 molar ratio of daunorubicin:cytarabine. Clinical trials in high risk acute myeloid leukemias demonstrated a significant benefit in CR rates and median OS, culminating in FDA approval August 2017. Emerging pediatric data suggest this benefit may extend to acute lymphoblastic leukemia (ALL). The following pilot trial was performed to better understand the activity and toxicity profile in adults with relapsed and refractory ALL. Methods: Adults with ALL or mixed phenotype leukemia were eligible if >5% lymphoblasts and/or extramedullary disease >1x1cm. Induction consisted of Vyxeos 100 units/m2 on days 1, 3 and 5. Those with clinical benefit could receive up to 3 cycles of consolidation delivered at 65 units/m2 on days 1 & 3 after recovery of neutrophils (>500 cells/uL) and platelets (>50,000 cells/uL). Response: 11 patients (pts) have been treated to date, with median age of 39y (22-74y), 9 male, and 3 Caucasian. Six pts had B-ALL, including 1 B-myeloid. Four of 5 T-ALL pts had early T-cell precursor (ETP) phenotype. NGS was available in 9 pts, and included TP53 mutation (n=4), and PH-like changes (n=2). Median prior lines of therapy was 3, with 7 pts showing primary refractory disease. Prior blinatumomab, inotuzumab, CAR-T cell therapy, and allogeneic transplant were noted in 5, 2, 1, and 3 pts. Pancytopenia was uniform during induction, with febrile neutropenia noted in 9 pts. One pt passed from pneumonia after moving to comfort measures in lieu of intubation 20 days after Vyxeos, and is non-evaluable for response. A second pt developed grade 3 sepsis. The remainder of infections were grade 1-2. One pt had grade 3 gastrointestinal bleed, and 3 pts had grade 1 spontaneous subdural bleeding. One pt developed recurrent pericarditis in setting of anterior mediastinal mass. One case of veno-occlusive disease was observed in a pt with prior allogeneic transplant and inotuzumab. Median time to ANC recovery was 33.5 days among 10 evaluable pts. Two pts with refractory disease failed to recover platelets; among the remaining pts, median time to platelet recovery was 30.5 days. Adverse events were uncommon during consolidation, and include foot cellulitis and myopericarditis, each in 1 pt. Among 10 evaluable pts, 3 achieved CR/CRi, including 2 ETP T-ALL and one B-ALL. Two pts with TP53 mutation demonstrated >50% blast reduction with hematologic recovery, allowing for prolonged time to subsequent therapy. Four pts received 1-3 cycles consolidation. One pt was bridged to donor leukocyte infusion. Responses were noted in only 2 pts after progression following Vyxeos, highlighting refractory status of those enrolled. Median PFS was 57 days (95%CI: 10, 105), time to next therapy 76 days (95%CI: 47, 105), and OS 223 days (95%CI: 144, 302). Conclusions Vyxeos in high-risk refractory adult ALL was overall well tolerated and active, with median OS of approximately 7.5 months in this pilot trial. Confirmation of benefit in a larger study is warranted, incorporating a second induction course and/or the addition of novel agents to further improve on remission rate and duration of response. Disclosures Shah: Incyte: Research Funding; Jazz Pharmaceuticals: Research Funding; Servier Genetics: Other; BeiGene: Consultancy, Honoraria; Acrotech/Spectrum: Honoraria; Pharmacyclics/Janssen: Honoraria, Other: Expenses; Kite, a Gilead Company: Consultancy, Honoraria, Other: Expenses, Research Funding; Precision Biosciences: Consultancy; Amgen: Consultancy; Novartis: Consultancy, Other: Expenses; Pfizer: Consultancy, Other: Expenses; Bristol-Myers Squibb/Celgene: Consultancy, Other: Expenses; Adaptive Biotechnologies: Consultancy. Chavez: Astra Zeneca: Research Funding; Novartis: Consultancy; Merck: Research Funding; Morphosys: Speakers Bureau; Adaptive Biotech: Research Funding; ADC Therapeutics: Consultancy, Research Funding; Beigene: Speakers Bureau; Kite/Gilead: Consultancy; karyopharm: Consultancy; Epizyme: Speakers Bureau; Abbvie: Consultancy. Sokol: Dren Bio: Membership on an entity's Board of Directors or advisory committees; Kyowa-Kirin: Membership on an entity's Board of Directors or advisory committees. Lancet: Celgene/BMS: Consultancy; Millenium Pharma/Takeda: Consultancy; Daiichi Sankyo: Consultancy; AbbVie: Consultancy; BerGenBio: Consultancy; ElevateBio Management: Consultancy; Agios: Consultancy; Astellas: Consultancy; Jazz: Consultancy. OffLabel Disclosure: Vyxeos is being evaluated in the described trial for the treatment of relapsed or refractory acute lymphoblastic leukemia in adults.

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Phase I Study of Ixazomib Added to Chemotherapy in the Treatment of Acute Lymphoblastic Leukemia in Older Adults

Blood ◽

10.1182/blood-2020-139661 ◽

2020 ◽

Vol 136 (Supplement 1) ◽

pp. 41-42

Author(s):

Philip C. Amrein ◽

Karen K. Ballen ◽

Kristen E. Stevenson ◽

Traci M. Blonquist ◽

Andrew M. Brunner ◽

...

Keyword(s):

Overall Survival ◽

Acute Lymphoblastic Leukemia ◽

Complete Remission ◽

Board Of Directors ◽

Research Funding ◽

Lymphoblastic Leukemia ◽

Advisory Committees ◽

Survival Estimate ◽

Grade 3 ◽

Experienced Grade

Introduction: While progress has been made in the treatment of childhood leukemia, the outlook for patients >60 years of age with acute lymphoblastic leukemia (ALL) is poor with complete remission rates (CR) of approximately 60% and 3-year survivals (OS) of less than 15%. Intensified treatment in a later CALGB trial showed little improvement with a CR=61% and 5-year OS=6% (Stock, Cancer 2013). Ixazomib is an oral proteasome inhibitor, which has shown single agent activity and promising combination activity in pediatric ALL patients (Messinger, Blood 2012). We sought to assess the safety and tolerability, as well as early efficacy of adding ixazomib to a current MGH-DFCI/HCC multi-agent regimen for older adults with ALL. Methods: Patients aged 51 to 75 years of age with newly diagnosed B-ALL and T-ALL were screened for eligibility. Patients with mature ALL (including Burkitt's) were excluded. Patients with Philadelphia chromosome positive ALL (BCR-ABL1+) were eligible, and dasatinib was added to the chemotherapy on Day 10 for these patients. The chemotherapy treatment schedule from induction through maintenance is outlined in Table 1. A standard 3 + 3 patient cohort dose escalation design was used to determine the maximum tolerated dose (MTD) of ixazomib during induction for these patients, the primary objective of the trial. After consolidation I, patients in complete remission (CR) with a suitable donor were offered a hematopoietic stem cell transplantation (HSCT) as per institutional guidelines. Those not going to HSCT continued therapy as noted in the table. Results: There were 19 patients with B-ALL enrolled, none with T-ALL. Among these patients, 7 harbored BCR-ABL1 rearrangements. The median age was 65 years, 74% were male, and 90% had a performance status 0 or 1. The MTD was 2.3 mg of ixazomib, as 2 patients at 3.0 mg developed DLT's: a grade 3 peripheral neuropathy and a grade 5 acute kidney injury (Table 2). Grade 3 and 4 toxicities encountered at any time consisted mainly of grade 4 neutropenia in 13 patients and grade 4 thrombocytopenia in 12 patients. One patient experienced grade 3 neutropenia and 5 patients experienced grade 3 thrombocytopenia. Two patients with grade 2 neuropathy did not meet the definition of DLT. Among the 19 patients, 15 (79%, [95% confidence interval (CI), 54-94%]) achieved CR (14) or CRi (1), and 5 patients went on to HSCT. The median follow-up time was 2 years (range, 1-5) for 8 patients remaining alive. The 1-year overall survival estimate was 53% [95% CI, 29-72%], while the 2-year overall survival estimate was 47% [95% CI, 24-67%]. Conclusions: A dose of 2.3 mg of ixazomib in combination with induction chemotherapy among older patients with ALL was well-tolerated and associated with a promising rate of complete remission. Disclosures Amrein: Takeda: Research Funding; AstraZeneca: Consultancy, Research Funding; Amgen: Research Funding. Brunner:Celgene: Membership on an entity's Board of Directors or advisory committees, Research Funding; Takeda: Research Funding; AstraZeneca: Research Funding; Forty-Seven Inc: Membership on an entity's Board of Directors or advisory committees; Jazz Pharmaceuticals: Membership on an entity's Board of Directors or advisory committees; Novartis: Research Funding. Hobbs:Novartis: Honoraria; Celgene/BMS: Honoraria; Jazz: Honoraria; Constellation: Honoraria, Research Funding; Incyte: Research Funding; Merck: Research Funding; Bayer: Research Funding. Neuberg:Celgene: Research Funding; Pharmacyclics: Research Funding; Madrigak Pharmaceuticals: Current equity holder in publicly-traded company. Fathi:Takeda: Consultancy, Research Funding; Agios: Consultancy, Research Funding; PTC Therapeutics: Consultancy; Amphivena: Consultancy; Astellas: Consultancy; Daiichi Sankyo: Consultancy; Novartis: Consultancy; Newlink Genetics: Consultancy; Pfizer: Consultancy; Blueprint: Consultancy; Trillium: Consultancy; Kura Oncology: Consultancy; Forty Seven: Consultancy; Jazz: Consultancy; Boston Biomedical: Consultancy; BMS/Celgene: Consultancy, Research Funding; Kite: Consultancy; Trovagene: Consultancy; Amgen: Consultancy; Seattle Genetics: Consultancy, Research Funding; Abbvie: Consultancy. OffLabel Disclosure: MLN 9708, ixazomib is FDA approved for multiple myeloma. In this trial it is used to treat acute lymphoblastic leukemia.

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Pediatric-Inspired Chemotherapy Incorporating Pegaspargase Is Safe and Results in High Rates of MRD Negativity in Adults Ages 18-60 with Philadelphia Chromosome-Negative Acute Lymphoblastic Leukemia and Lymphoblastic Lymphoma

Blood ◽

10.1182/blood-2018-99-115486 ◽

2018 ◽

Vol 132 (Supplement 1) ◽

pp. 4013-4013 ◽

Cited By ~ 2

Author(s):

Mark Blaine Geyer ◽

Ellen K. Ritchie ◽

Arati V. Rao ◽

M. Isabella Cazacu ◽

Shreya Vemuri ◽

...

Keyword(s):

Acute Lymphoblastic Leukemia ◽

Board Of Directors ◽

Research Funding ◽

Lymphoblastic Leukemia ◽

Philadelphia Chromosome ◽

Advisory Board ◽

Lymphoblastic Lymphoma ◽

Advisory Committees ◽

Grade 3

Abstract Introduction: Among adolescents and young adults with (w/) acute lymphoblastic leukemia (ALL) or lymphoblastic lymphoma (LBL), treatment using a pediatric (vs. adult) regimen appears to achieve superior event-free (EFS) and overall survival (OS); this observation has driven increased interest in adapting pediatric regimens for middle-aged adults w/ ALL/LBL. However, greater risk of toxicities associated w/ asparaginase complicates administration of pediatric-inspired regimens in adults. We therefore designed a pediatric-inspired chemotherapy regimen w/ doses of pegaspargase (PEG) rationally synchronized to limit overlapping toxicities w/ other chemotherapeutic agents. Methods: We conducted a phase II multi-center trial in adults ages 18-60 w/ newly-diagnosed Philadelphia chromosome-negative (Ph-) ALL/LBL (NCT01920737). Pts w/ Ph+ ALL or Burkitt-type ALL were ineligible. The treatment regimen consisted of 2-phase induction (I-1, I-2), followed by consolidation w/ 2 courses of alternating high-dose methotrexate-based intensification and reinduction, followed by 3 years of maintenance (Figure 1). PEG 2000 IU/m2 was administered in each of the 6 intensive courses of induction/consolidation at intervals of ≥4 weeks. Minimal residual disease (MRD) was assessed in bone marrow (BM) by multiparameter flow cytometry (FACS) on day (d) 15 of I1 and following I-1 and I-2. Any detectable MRD (even <0.01% of BM WBCs) was considered positive. Toxicities were assessed by CTCAE v4.0. Results: 39 pts were enrolled (30M, 9F), w/ B-ALL (n=28), T-ALL (n=7), B-LBL (n=3), and T-LBL (n=5). Median age at start of treatment was 38.3 years (range 20.2-60.4), w/ 18 pts age 40-60. Grade 3-4 toxicities associated w/ PEG are summarized in Table 1. Grade 3-4 hyperbilirubinemia was observed post-PEG in I-1 in 9 pts, but only recurred thereafter in 1/8 pts resuming PEG. Pts completing consolidation on protocol (n=16) received median of 6 doses of PEG (range, 2-6). Four pts developed hypersensitivity to PEG and subsequently received Erwinia asparaginase. PEG was discontinued in 4 additional pts due to hepatotoxicity (n=2), pancreatitis (n=1), and physician preference (n=1). Of pts w/ available response assessments, 35/36 (97%) achieved morphologic complete response (CR) or CR w/ incomplete hematologic recovery (CRi) following I-1 (n=34) or I-2 (n=1). Both pts not achieving CR/CRi after I-I had early T-precursor ALL; one of these pts was withdrawn from study, and the other (w/ M2 marrow after I-1) achieved CR after I-2. Of the pts w/ ALL (excluding LBL) w/ available BM MRD assessments, 11/28 (39%) achieved undetectable MRD by FACS following I-1; 18/22 (82%) achieved undetectable MRD by FACS following I-2. Of the pts w/ LBL w/ available BM MRD assessments, 7/7 (100%) achieved or maintained undetectable MRD by FACS following I-1 and I-2. Ten pts underwent allogeneic hematopoietic cell transplantation (alloHCT) in CR1. Seven pts experienced relapse at median 15.2 months from start of treatment (range, 5.4-30.4), of whom 6 subsequently underwent 1st (n=5) or 2nd (n=1) alloHCT. Of the 11 pts w/ ALL w/ undetectable MRD following I-1, only one has relapsed. Five patients have died, including 2 pts in CR1 (from sepsis and multi-organ system failure), and 3 pts in relapse. At median follow-up of 22.3 months among surviving pts (range, 1.0-48.1), median EFS and OS (Figure 2A&B) have not been reached (EFS not censored at alloHCT). 3-year EFS was 62.1% (95% CI: 38.4-78.9%) and 3-year OS was 80.0% (95% CI: 57.5-91.4%). Conclusions: PEG can be incorporated into pediatric-inspired chemotherapy regimens w/ manageable toxicity for appropriately selected adults up to age 60 w/ Ph- ALL/LBL. While PEG-related AEs are common, few pts require permanent discontinuation of asparaginase. Grade 3-4 hyperbilirubinemia was common, particularly post-I-1, but recurred infrequently when PEG was continued. Two induction courses resulted in a high rate of MRD negativity post-I-2 and translated to a low rate of relapse. Though further follow-up is required, 3-year EFS is encouraging. Data regarding asparaginase enzyme activity and silent inactivation w/ neutralizing anti-PEG antibody will be presented. Ongoing and future studies will additionally investigate whether incorporating novel therapies (e.g. blinatumomab, nelarabine) into frontline consolidation therapy may reduce risk of relapse among adults receiving PEG-containing regimens. Disclosures Geyer: Dava Oncology: Honoraria. Ritchie:Celgene: Consultancy, Other: Travel, Accommodations, Expenses, Speakers Bureau; NS Pharma: Research Funding; Incyte: Consultancy, Speakers Bureau; ARIAD Pharmaceuticals: Speakers Bureau; Astellas Pharma: Research Funding; Bristol-Myers Squibb: Research Funding; Novartis: Consultancy, Other: Travel, Accommodations, Expenses, Research Funding, Speakers Bureau; Pfizer: Consultancy, Research Funding. Rao:Kite, a Gilead Company: Employment. Tallman:Daiichi-Sankyo: Other: Advisory board; AROG: Research Funding; Cellerant: Research Funding; AbbVie: Research Funding; BioSight: Other: Advisory board; Orsenix: Other: Advisory board; ADC Therapeutics: Research Funding. Douer:Shire: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Gilead Sciences: Consultancy; Amgen: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Jazz Pharmaceuticals: Consultancy; Pfizer: Honoraria; Spectrum: Consultancy. Park:Kite Pharma: Consultancy; Juno Therapeutics: Consultancy, Research Funding; Amgen: Consultancy, Membership on an entity's Board of Directors or advisory committees; AstraZeneca: Consultancy; Novartis: Consultancy; Shire: Consultancy; Pfizer: Consultancy; Adaptive Biotechnologies: Consultancy.

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Blinatumomab in Combination with Pembrolizumab Is Safe for Adults with Relapsed or Refractory B-Lineage Acute Lymphoblastic Leukemia: University of California Hematologic Malignancies Consortium Study 1504

Blood ◽

10.1182/blood-2019-131061 ◽

2019 ◽

Vol 134 (Supplement_1) ◽

pp. 3880-3880 ◽

Cited By ~ 3

Author(s):

Marc Schwartz ◽

Lloyd E. Damon ◽

Deepa Jeyakumar ◽

Caitlin L. Costello ◽

Dimitrios Tzachanis ◽

...

Keyword(s):

Bone Marrow ◽

Acute Lymphoblastic Leukemia ◽

Board Of Directors ◽

Research Funding ◽

Lymphoblastic Leukemia ◽

Complete Response ◽

Advisory Committees ◽

High Bone ◽

Grade 3 ◽

Expansion Cohort

Clinical and preclinical findings suggest that PD-L1 overexpression on lymphoblasts and in the bone marrow microenvironment may mediate resistance to blinatumomab by inhibiting T-cell activation. We report preliminary findings from an ongoing phase I/II multicenter trial to evaluate the safety and efficacy of blinatumomab with pembrolizumab in adults with relapsed or refractory (R/R) B-cell acute lymphoblastic leukemia (B-ALL) and a high bone marrow lymphoblast percentage (NCT 03160079). The primary objective of this Phase I/II trial is to determine overall response rate (ORR = complete response (CR) + complete response with partial hematologic recovery (CRh) rate) after 1-2 cycles of blinatumomab with pembrolizumab, with key secondary endpoints of adverse events (AEs), minimal residual disease (MRD)-negative CR/CRh rate, 2-year disease-free and overall survival, and allogeneic HCT rate. Eligible patients are 18 years of age or older with R/R B-ALL after ≥ 1 prior line of therapy (including Philadelphia chromosome positive (Ph+) B-ALL failing one second or third generation tyrosine kinase inhibitor) and >50% lymphoblasts on screening bone marrow sample. Patients receive blinatumomab by continuous IV at 9 mcg/day on days 1-7 and 28 mcg/day on days 8-28 of cycle 1, then 28 mcg/day on days 1-28 in subsequent cycles. Pembrolizumab 200 mg IV is given on days 15 and 36 of each 42-day cycle. Patients in CR/CRh after 1-2 cycles complete a maximum of 5 cycles. A safety cohort of up to 6 patients assessed safety by 3+3 design. Dose-limiting toxicities (DLTs) were defined as Grade 3 or 4 non-hematologic AEs related to the addition of pembrolizumab to blinatumomab with a DLT monitoring period of 28 days from the first pembrolizumab dose. At the time of this analysis, 5 patients have been enrolled and treated with all 5 completing the DLT monitoring period. Patients had a median age of 60 years (range 22-74) and one had Ph+ disease. Median bone marrow lymphoblast percentage at time of enrollment was 84% (range 53-90). Patients received a median of 1 cycle (range 1-3) of blinatumomab with pembrolizumab. Common AEs included fever, headache, increased bilirubin, nausea, neurotoxicity, and tachycardia. Grade 3-4 non-hematologic AEs included disseminated intravascular coagulation, hyperferritinemia, hypokalemia, subdural hematoma, encephalopathy, hyponatremia, and macrophage activation syndrome in 1 patient (all related to blinatumomab), hyperbilirubinemia and elevated AST in 1 patient, and hypertriglyceridemia in 1 patient. No grade 3 or greater immune-related AEs have occurred. No pembrolizumab-related DLTs occurred in the first 5 patients in the safety cohort and enrollment is now proceeding in the dose-expansion cohort. The ORR was 50% with 2/4 evaluable patients achieving a CR. One patient achieved an MRD-negative CR in cycle 1 and completed 3 cycles before proceeding to allogeneic HCT. One patient discontinued treatment due to subdural hemorrhage and macrophage activation syndrome during cycle 1 and achieved a CR. Both patients remain in CR for over 6 months. Two patients discontinued treatment due to refractory or progressive disease. The one patient not evaluable for response withdrew from study therapy after 1 cycle without ALL progression. Patient, disease, and treatment characteristics as well as outcomes are summarized in the Table. Blinatumomab with pembrolizumab is safe for adults with R/R B-ALL and a high bone marrow lymphoblast percentage. Enrollment continues in the dose-expansion cohort to assess efficacy. Disclosures Damon: Jazz Pharmaceuticals: Membership on an entity's Board of Directors or advisory committees. Costello:Celgene: Consultancy, Honoraria, Research Funding; Janssen: Research Funding; Takeda: Honoraria, Research Funding. Schiller:Biomed Valley Discoveries: Research Funding; Astellas: Research Funding; Amgen: Other, Research Funding; Agios: Research Funding, Speakers Bureau; Bristol Myer Squibb: Research Funding; Celgene: Research Funding, Speakers Bureau; Constellation Pharmaceutical: Research Funding; Daiichi Sankyo: Research Funding; Eli Lilly and Company: Research Funding; FujiFilm: Research Funding; Genzyme: Research Funding; Gilead: Research Funding; Incyte: Research Funding; J&J: Research Funding; Jazz Pharmaceuticals: Honoraria, Research Funding; Karyopharm: Research Funding; Novartis: Research Funding; Onconova: Research Funding; Pfizer Pharmaceuticals: Equity Ownership, Research Funding; Sangamo Therapeutics: Research Funding. Wieduwilt:Celgene: Membership on an entity's Board of Directors or advisory committees; Amgen, Leadiant, Merck, Servier: Research Funding; Reata Pharmaceuticals: Equity Ownership; Daiichi Sankyo: Membership on an entity's Board of Directors or advisory committees. OffLabel Disclosure: Pembrolizumab (given off label)to enhance the efficacy of blinatumomab (given on label) for relaped/refractory B-cell acute lymphoblastic leukemia

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Blinatumomab in Children with Relapsed or Refractory B-Precursor Acute Lymphoblastic Leukemia (R/R-ALL): Final Results of 110 Patients Treated in an Expanded Access Study (RIALTO)

Blood ◽

10.1182/blood-2020-141336 ◽

2020 ◽

Vol 136 (Supplement 1) ◽

pp. 24-25

Author(s):

Franco Locatelli ◽

Gerhard Zugmaier ◽

Noemi Mergen ◽

Peter Bader ◽

Sima Jeha ◽

...

Keyword(s):

Acute Lymphoblastic Leukemia ◽

Board Of Directors ◽

Research Funding ◽

Lymphoblastic Leukemia ◽

Final Analysis ◽

Publicly Traded ◽

Primary Analysis ◽

Advisory Committees ◽

Grade 3

Introduction: The open-label, expanded access study (RIALTO) demonstrated that blinatumomab is efficacious with a manageable safety profile in children with relapsed or refractory B-cell precursor acute lymphoblastic leukemia (R/R BCP-ALL). Blinatumomab is a BiTE® (bispecific T-cell engager) immuno-oncology therapy that activates cytotoxic T cells to kill target B cells. Here, findings from the final analysis of RIALTO are presented (NCT02187354). Methods: Enrolled in the study were children >28 days and <18 years of age with R/R CD19+ BCP-ALL (defined as ≥2 relapses, relapse after allogeneic hematopoietic stem cell transplant [alloHSCT], or refractory to prior treatments) and ≥5% blasts or <5% blasts but with minimal residual disease (MRD) level ≥10−3. Blinatumomab was given as continuous infusion in a 6-week cycle (4 weeks on and 2 weeks off) for up to 5 cycles and safety follow-up visit 30 days post-treatment. Patients with <25% blasts were dosed at 15 µg/m2/day, whereas those with ≥25% blasts were dosed at 5 µg/m2/day (days 1-7 of cycle 1) followed by dose increase to 15 µg/m2/day. Primary endpoint was incidence of treatment-emergent (TE) and treatment-related (TR) adverse events (AEs). Secondary endpoints included complete response (CR; <5% blasts) and MRD response (<10−4 blasts by PCR or flow-cytometry) in the first 2 cycles, relapse-free survival (RFS), overall survival (OS), and alloHSCT rate after blinatumomab treatment. Results: As of the data cutoff date (January 10, 2020) for the final analysis, demographics and baseline characteristics of 110 patients enrolled (median age, 8.5 years [95% CI 0.4-17.0]), 61% had <50% blasts at baseline, and 11% had <5% blasts (n=12; with MRD ≥10−3) remain unchanged compared with the primary analysis (Table 1). For best treatment response within the first 2 cycles, results are comparable to that of the primary analysis. Among 110 patients, overall CR rate was 62.7% (n= 69). Of 98 patients with ≥5% blasts at baseline, 59% (n=58) achieved CR; of them, 79% (n=46) achieved an MRD response and 62% (n=39) proceeded to HSCT. The 2 patients with t(17;19) achieved CR with an MRD response. Of the 4 patients with germline trisomy 21 (Down syndrome), 3 achieved CR with an MRD response Among the 12 patients with <5% blasts but with MRD ≥10−3 at baseline, 92% (n=11) achieved CR and MRD response; 75% (n=9) proceeded to HSCT (Table 2). Of the 5 patients who had received prior blinatumomab , 4 achieved CR. Of 110 patients treated with blinatumomab, median OS (95% CI) was 14.6 (11-24.5) months with median follow-up time of 18.2 months, which increased by 1.5 months compared with that reported in the primary analysis, with 29.9% of patients still surviving at month 24. Median RFS (95% CI) remains unchanged at 8.5 months (4.7-14.0), with a median follow-up time of 11.5 months in patients who achieved CR; 38% of patients relapsed and 9% died. RFS was more favorable for patients who received HSCT post blinatumomab (70%) than for those who did not (30%) at month 12, respectively, which is consistent with the results from primary analysis. Among patients who had HSCT prior to blinatumomab (n= 45), median OS (95%) was 16.6 (7.1-NE) months vs 14.6 (10.9-24.5) months in patients without HSCT prior to blinatumomab (n= 65). Compared with the primary analysis, 5 additional patients received HSCT after achieving CR in the final analysis. Median OS among patients in CR after HSCT by MRD responders vs MRD non-responders was NE at 15-month analysis (Figure). Safety results in the final analysis were consistent with those reported in the primary analysis. Of 110 patients, 99% experienced TEAEs, with 65% being grade ≥3 (see Table 3 for details). TRAEs were reported in 74% of patients; 26% were grade ≥3 and 19% were deemed serious. Details on grade ≥3 TRAEs are shown in Table 3. The 9 fatal AEs, unrelated to blinatumomab, occurred due to relapse and progressive nature of the disease (Table 3). Conclusions: Overall, the safety and efficacy results from the final analysis are consistent with those reported in the primary analysis as no new safety signals were observed. These findings strengthen the observation that blinatumomab demonstrates durable efficacy and is a suitable treatment option in children with R/R BCP-ALL. Table 1. Disclosures Locatelli: Novartis: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Medac: Speakers Bureau; Miltenyi: Speakers Bureau; Bellicum Pharmaceutical: Membership on an entity's Board of Directors or advisory committees; Jazz Pharmaceeutical: Speakers Bureau; Amgen: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau. Zugmaier:Amgen: Current Employment, Other: Personal Fees ; 20190300609: Patents & Royalties: Licensed patient . Mergen:Amgen: Current Employment, Current equity holder in publicly-traded company. Bader:Medac: Patents & Royalties, Research Funding; Amgen: Consultancy, Speakers Bureau; Neovii: Research Funding; Celgene: Consultancy; Novartis: Consultancy, Speakers Bureau; Riemser: Research Funding. Schlegel:bluebird bio: Honoraria. Bourquin:Servier: Other: Travel Support. Handgretinger:Amgen: Honoraria. Brethon:Amgen: Other: invitation to meetings, remunerations for oral presentations, advices for the record of Blinatumomab in pediatrics in France. Rössig:Roche: Honoraria, Membership on an entity's Board of Directors or advisory committees; BMS: Honoraria; Pfizer: Honoraria; Celgene: Membership on an entity's Board of Directors or advisory committees; EUSA Pharma: Membership on an entity's Board of Directors or advisory committees; Genetech: Membership on an entity's Board of Directors or advisory committees; Novartis: Membership on an entity's Board of Directors or advisory committees; Amgen: Membership on an entity's Board of Directors or advisory committees. Kormany:Amgen: Current Employment, Current equity holder in publicly-traded company. Viswagnachar:IQVIA: Current Employment.

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Blinatumomab in Pediatric Patients with Relapsed/Refractory B-Cell Precursor and Molecularly Resistant Acute Lymphoblastic Leukemia (R/R ALL): Updated Analysis of 110 Patients Treated in an Expanded Access Study (RIALTO)

Blood ◽

10.1182/blood-2019-121615 ◽

2019 ◽

Vol 134 (Supplement_1) ◽

pp. 1294-1294 ◽

Cited By ~ 2

Author(s):

Franco Locatelli ◽

Gerhard Zugmaier ◽

Peter Bader ◽

Sima Jeha ◽

Paul-Gerhardt Schlegel ◽

...

Keyword(s):

Acute Lymphoblastic Leukemia ◽

Children And Adolescents ◽

Board Of Directors ◽

Research Funding ◽

Pediatric Patients ◽

Lymphoblastic Leukemia ◽

Advisory Committees ◽

Expanded Access ◽

Grade 3

Introduction: Although survival rates in children and adolescents with acute lymphoblastic leukemia (ALL) have improved significantly, relapsed or refractory (R/R) ALL remains a leading cause of cancer-related deaths in pediatric patients. Blinatumomab is a bispecific T-cell engager (BiTE®) immuno-oncology therapy that activates endogenous cytotoxic T cells to kill target B cells. We report the primary analysis results of RIALTO, an expanded access study, where pediatric patients with R/R ALL were treated with blinatumomab (NCT02187354). Methods: Enrolled in the study were children and adolescents >28 days and <18 years of age with R/R CD19+ ALL (defined as ≥2 relapses, relapse after allogeneic hematopoietic stem cell transplant [HSCT], or refractory to prior treatments) and ≥5% blasts or <5% blasts but with minimal residual disease (MRD) level ≥10−3. Blinatumomab was given as continuous infusion in a 6-week cycle (4 weeks of treatment and 2 weeks of treatment-free interval) for up to 5 cycles. Patients with <25% blasts were dosed at 15 µg/m2/day, whereas those with ≥25% blasts were dosed at 5 µg/m2/day (days 1-7 of cycle 1) followed by dose increase to 15 µg/m2/day. Any change in therapy (eg, HSCT) was off-protocol and per investigator preference. Primary endpoint was incidence of treatment-emergent (TE) and treatment-related (TR) adverse events (AEs). Secondary endpoints included incidence of morphological complete response (CR; <5% blasts) and MRD response (<10−4 blasts by PCR or flow cytometry) in the first 2 cycles, relapse-free survival (RFS), overall survival (OS), and HSCT rate after blinatumomab treatment. Data cutoff was September 27, 2018. Results: Of 110 patients enrolled (median age, 8.5 years [95% CI 0.4-17.0]), 60% were 7-17 years of age, 61% had <50% blasts at baseline, and 11% had <5% blasts (n=12; with MRD ≥10−3). Among 12 patients with <5% blasts and MRD-positive disease at baseline, 0 had prior relapse after HSCT and 2 had chromosome translocation mutations. Prior treatments included HSCT (41%) and blinatumomab (5%); 56% of patients had ≥2 relapses and 40% relapsed after HSCT (Table 1). Of 98 patients with ≥5% blasts at baseline, 58 (59%) achieved CR (<5% blasts), 0 achieved partial remission (PR; ≥5 to <25% blasts), and 20 (20%) showed progressive disease (PD; ≥25% blasts) after the first 2 cycles. Of the 58 patients who reached CR, 39 (67%) achieved CR with full recovery of peripheral blood counts, 46 (47%) achieved an MRD response, and 36 (62%) proceeded to HSCT after achieving CR. The 2 patients with t(17;19) achieved CR with an MRD response. Of the 4 patients with germline trisomy 21 (Down syndrome), 3 achieved CR with an MRD response. Among the 12 patients with <5% blasts but with MRD ≥10−3 at baseline, 11 (92%) achieved CR and MRD response and 1 (8%) had disease progression (Table 2). Overall, the response rates were higher among patients with lower tumor burden at baseline. Among 98 patients with ≥5% blasts at baseline, median OS was 13.1 months (95% CI, 9.8-21.3), with median follow-up time of 17.4 months. For patients reaching CR after the first 2 cycles, the median RFS was 8.5 months (95% CI, 3.4-NE), with a median follow-up time of 11.2 months; 38% of patients relapsed and 9% died. Of 110 patients treated with blinatumomab, 99% experienced TEAEs, with 65% being grade ≥3, including neurologic events (6%), cytokine release syndrome (CRS, 2%), cytopenias (38%), elevated liver enzymes (13%), infections (18%), and neutropenia (14%). TRAEs were reported in 74% of patients; 36% were grade ≥3 and 26% were deemed serious. Grade ≥3 TRAEs included neurologic events (5%), CRS (2%), cytopenias (9%), elevated liver enzyme (4%), infections (5%), and neutropenia (6%). Due to TRAEs, 22% of patients interrupted treatment and 5% discontinued treatment. The 9 fatal AEs, unrelated to blinatumomab, occurred due to relapse and progressive nature of the disease (Table 3). Conclusion: Overall, the safety profile of blinatumomab in this expanded access study in pediatric patients with R/R ALL was tolerable and consistent with that in other blinatumomab clinical trials. Patients, including those with persistent MRD and genetic disorders at baseline, achieved high rates of CR and MRD responses with low rates of relapse and disease progression. These findings support blinatumomab as a suitable treatment option for pediatric patients with R/R ALL. Disclosures Locatelli: BluebirdBio: Consultancy; Bellicum: Consultancy, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Novartis: Consultancy, Membership on an entity's Board of Directors or advisory committees; Miltenyi: Honoraria; Amgen: Consultancy, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau. Zugmaier:Amgen: Employment, Other: holds stock, Patents & Royalties: & other intellectual property. Bader:Amgen (Brasil), Novartis: Consultancy, Speakers Bureau; Medac: Patents & Royalties, Research Funding; Riemser, Neovii: Research Funding; Celgene: Consultancy. Bourquin:Servier: Other: Travel support. Rossig:BMS, Pfizer, Roche: Other: speaker honoraria; Amgen, Celgene,EUSA Pharma, Genetech, Novartis, Roche: Other: advisory board.

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Pegaspargase Can Safely be Administered in Adults Age 40 and Older with Acute Lymphoblastic Leukemia

Blood ◽

10.1182/blood-2019-124727 ◽

2019 ◽

Vol 134 (Supplement_1) ◽

pp. 3816-3816 ◽

Cited By ~ 2

Author(s):

Ryan J. Daley ◽

Sridevi Rajeeve ◽

Charlene C. Kabel ◽

Jeremy J. Pappacena ◽

Sarah E. Stump ◽

...

Keyword(s):

Acute Lymphoblastic Leukemia ◽

Board Of Directors ◽

Research Funding ◽

Lymphoblastic Leukemia ◽

Philadelphia Chromosome ◽

Hypersensitivity Reactions ◽

Newly Diagnosed ◽

Advisory Committees ◽

Hematopoietic Stem ◽

Frontline Treatment

Introduction: Asparaginase (ASP) has demonstrated a survival benefit in pediatric patients (pts) with acute lymphoblastic leukemia (ALL) and is now part of standard-of-care frontline treatment. As a result, asparaginase preparations have been incorporated into the treatment of adult ALL to improve outcomes. Pegaspargase (PEG-ASP), a modified version of asparaginase with prolonged asparagine depletion, appears to be safe in adults up to age 40 (Stock, et al., Blood, 2019), but is associated with a unique spectrum of toxicities, the risks of which appear to increase with age. Therefore, the safety of PEG-ASP remains a significant concern in older adults w/ ALL. Methods: We conducted a single center retrospective chart review of pts age ≥40 years who received PEG-ASP as part of frontline induction/consolidation or reinduction, between March 2008 and June 2018 at Memorial Sloan Kettering Cancer Center. The primary objective was to evaluate the tolerability and toxicity of PEG-ASP based on the incidence and severity of ASP-related toxicities (hypersensitivity reactions, hypertriglyceridemia, hyperbilirubinemia, transaminitis, pancreatitis, hypofibrinogenemia, etc) according to the Common Terminology Criteria for Adverse Events, version 4.03. Laboratory values recorded were either the peak or the nadir, the more appropriate for toxicity assessment, within a 4-week period following PEG-ASP administration. Secondary objectives were to determine the total number of doses of PEG-ASP administered in comparison to the number of doses intended, and to characterize the rationale for PEG-ASP discontinuation when applicable. Fisher's exact test was used to compare the incidence of PEG-ASP toxicities with respect to pt and treatment characteristics (regimen, age, BMI, gender, Philadelphia chromosome positive (Ph+) vs. Ph-, presence of extramedullary disease, PEG-ASP dose). P values were not adjusted for multiple comparisons. Results: We identified 60 pts with ALL (40 B-ALL and 20 T-ALL) who received at least one dose of PEG-ASP. Nine pts were Ph+. The median pt age at initiation of the treatment was 53, (range, 40 to 80), and 19 pts had a BMI ≥30 kg/m2. Forty-four pts received treatment for newly diagnosed ALL, and 16 pts for relapsed disease. Table 1 lists pt baseline characteristics. Among the 44 pts with newly diagnosed ALL, 27 pts received PEG-ASP as part of pediatric or pediatric-inspired regimens at doses of 2000 - 2500 units/m2, and 1 pt received a modified dose of 1000 units/m2 due to age. The remaining 16 pts received PEG-ASP at doses of 1000 - 2000 units/m2 for consolidation, per established adult regimens (ALL-2 and L-20; Lamanna, et al., Cancer, 2013). Grade 3/4 ASP-related toxicities with a >10% incidence included: hyperbilirubinemia, transaminitis, hypoalbuminemia, hyperglycemia, hypofibrinogenemia, and hypertriglyceridemia. Frontline treatment regimens in which PEG-ASP was used in consolidation cycles only (ALL-2, L-20) were associated w/ a lower incidence of hyperbilirubinemia (p=0.009) and hypertriglyceridemia (p<0.001) compared to those regimens that included PEG-ASP during induction (pediatric/pediatric-inspired regimens) (Table 2). Younger age (40-59 vs. ≥60 years) was associated with a greater risk of hypertriglyceridemia (p<0.001) and higher PEG-ASP dose (≥2000 vs. <2000 units/m2) was associated with a greater risk of hypertriglyceridemia and hypofibrinogenemia (p=0.002 and p=0.025, respectively). Thirty-eight pts (63%) received all intended doses of PEG-ASP. Six pts stopped PEG-ASP to proceed to allogeneic hematopoietic stem cell transplantation (5 in CR1, 1 in CR2), and 7 pts stopped for hypersensitivity reactions. Hepatotoxicity was the only ASP-related toxicity that led to PEG-ASP discontinuation occurring in 5 pts (hyperbilirubinemia, N=4; transaminitis, N=1). The total number of intended doses of PEG-ASP based on regimens used was 186, and 112 were administered. Conclusion: PEG-ASP was incorporated into the treatment of 60 adult ALL pts age ≥40, with manageable toxicity. Seven pts discontinued PEG-ASP due to hypersensitivity reactions and 5 discontinued due to hepatotoxicity, but other reported toxicities did not lead to PEG-ASP discontinuation and the majority of the pts completed all intended doses of PEG-ASP. This study suggests that with careful monitoring, PEG-ASP can safely be administered in adults ≥40 years of age. Disclosures Rajeeve: ASH-HONORS Grant: Research Funding. Tallman:UpToDate: Patents & Royalties; Oncolyze: Consultancy, Membership on an entity's Board of Directors or advisory committees; Delta Fly Pharma: Consultancy, Membership on an entity's Board of Directors or advisory committees; Abbvie: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding; Rigel: Consultancy, Membership on an entity's Board of Directors or advisory committees; Cellerant: Research Funding; Tetraphase: Consultancy, Membership on an entity's Board of Directors or advisory committees; Nohla: Consultancy, Membership on an entity's Board of Directors or advisory committees; BioLineRx: Consultancy, Membership on an entity's Board of Directors or advisory committees; Orsenix: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding; ADC Therapeutics: Research Funding; Biosight: Research Funding; Jazz Pharmaceuticals: Consultancy, Membership on an entity's Board of Directors or advisory committees; KAHR: Consultancy, Membership on an entity's Board of Directors or advisory committees; Daiichi-Sankyo: Consultancy, Membership on an entity's Board of Directors or advisory committees. Geyer:Dava Oncology: Honoraria; Amgen: Research Funding. Park:Takeda: Consultancy; Allogene: Consultancy; Amgen: Consultancy; AstraZeneca: Consultancy; Autolus: Consultancy; GSK: Consultancy; Incyte: Consultancy; Kite Pharma: Consultancy; Novartis: Consultancy.

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Impact of Antithymocyte Globulin-Containing Conditioning Regimens on Patients Undergoing Allogeneic Stem Cell Transplantation for Progressive Myelodysplastic Syndrome: A Report From the SFGM-TC Group

Blood ◽

10.1182/blood.v118.21.3035.3035 ◽

2011 ◽

Vol 118 (21) ◽

pp. 3035-3035

Author(s):

Ibrahim Yakoub-Agha ◽

Gandhi Damaj ◽

Marie Robin ◽

Stephane Vigouroux ◽

Alice Garnier ◽

...

Keyword(s):

Stem Cell ◽

Stem Cell Transplantation ◽

Board Of Directors ◽

Cumulative Incidence ◽

Research Funding ◽

Acute Gvhd ◽

Conditioning Regimen ◽

Refractory Disease ◽

Advisory Committees ◽

Grade 3

Abstract Abstract 3035 Background: due to a risk of relapse of underlying disease in patients transplanted with progressive malignancy, the use of antithymocyte globulins (ATG), incorporated within the conditioning regimen prior to allogeneic stem cell transplantation (allo-SCT), is still controversial. We report here on a study of 245 consecutive patients transplanted between January 1999 and December 2009 in 26 French and Belgian centers for progressive MDS, defined as stable, untreated, relapsed or refractory disease. Patients and Methods: Inclusion criteria included patients aged over 18 who received allo-SCT from either a sibling (n=153) or HLA-A, -B, -C, -DRB1 and -DQB1 allele matched unrelated donor (10/10) (n=86) for MDS or AML/RAEB-t (with 20–30% BM blasts). Data quality was ensured using computerized discrepancy errors and vigorous on-site data verification of every single file. A qualified research technicien has been appointed by the University-Hospital of Lille to assist on-site centers that couldn't meet data quality requirements. HLA matching was double-checked by the French Bone Marrow Donor Registry. Results: The first 239 files analyzed until now are presented, including 154 males and 85 females. According to the WHO classification at diagnosis, 85 patients had RA/RARS/RCMD, 86 RAEB1, 62 REAB2 and 6 RAEB-t/AML. Sixty-six patients had progressed to a more advanced disease before allo-SCT. At diagnosis, 102 patients had an IPSS int-2 or higher. Cytogenetic IPSS was recorded as favorable (n=109), intermediate (n=61), unfavorable (n=63) and missing (n=6). Disease status at transplant was established as follows: relapsed or refractory disease (n=106) and untreated or stable disease without hematological improvement (n=133). Median age at transplantation was 53 years (range, 20–70). Patients received myeloablative conditioning (n=105) and nonmyeloablative (n=134) including busulfan-based regimens (n=127), TBI-based regimens (n=92) or other alkylating-agent-based regimens (n=20). In this series, 95 patients (40%) received ATG as part of conditioning ('ATG' group), whereas 144 did not ('no-ATG' group). The analysis reference date of April 1st 2011, median follow-up in survivors was 50 months (IQR, 33–92) with 59 patients having died of relapse and 77 of TRM. The estimated 3-year OS and EFS was respectively 42.3%, and 32.4%. The probability of relapse, overall and event-free survival at 3 years was not significantly different between the two groups. In contrast, the cumulative incidence of grade 2–4 acute GVHD was 48% in the no-ATG group and 30% ATG group (P <.001) and the cumulative incidence of grade 3–4 acute GVHD was 24% and 11% respectively (P <.001). Although the cumulative incidence of chronic GVHD was similar in the no-ATG and ATG groups (64% vs 46%, p=.15), a trend for a lower TRM was observed in the ATG group (22% vs 31%, p=.06). In multivariate analysis, the absence of use of ATG was the strongest parameter associated with an increased risk of acute grade 2–4 [HR = 2.28, 95% CI: 1.39–3.74, p=.001] and grade 3–4 GVHD [HR = 2.19, 95% CI: 1.04–4.61, p=.035]. In conclusion, the addition of ATG to the conditioning regimen resulted in a decreased incidence of acute GVHD without increasing relapse rates and compromising patient survival undergoing allo-SCT for progressive MDS. Disclosures: Yakoub-Agha: Genzyme: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Celgene: Honoraria, Research Funding; Fresinus: Honoraria, Membership on an entity's Board of Directors or advisory committees; Roche: Honoraria, Membership on an entity's Board of Directors or advisory committees; Janssen: Honoraria. Michallet:Genzyme: Honoraria, Membership on an entity's Board of Directors or advisory committees; Fresinus: Honoraria, Membership on an entity's Board of Directors or advisory committees. Deconinck:Celgene: Honoraria. Mohty:Genzyme: Honoraria, Membership on an entity's Board of Directors or advisory committees.

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Inotuzumab Ozogamicin (Ino) May Overcome the Impact of Philadelphia Chromosome (Ph)-like Phenotype in Adult Patients (pts) with Relapsed/Refractory (R/R) Acute Lymphoblastic Leukemia (ALL)

Blood ◽

10.1182/blood-2019-126940 ◽

2019 ◽

Vol 134 (Supplement_1) ◽

pp. 1641-1641 ◽

Cited By ~ 1

Author(s):

Elias Jabbour ◽

Kathryn G. Roberts ◽

Koji Sasaki ◽

Yaqi Zhao ◽

Chunxu Qu ◽

...

Keyword(s):

Gene Expression ◽

Overall Survival ◽

Stem Cell ◽

Acute Lymphoblastic Leukemia ◽

B Cell ◽

Board Of Directors ◽

Research Funding ◽

Lymphoblastic Leukemia ◽

Advisory Committees ◽

The Impact

Background: Ino showed significant activity in phase II trials in pts with R/R ALL, that was subsequently confirmed in Phase III trial where Ino demonstrated higher response rates and superior overall survival vs standard of care chemotherapy (SOC) in adults with relapsed/refractory B-cell precursor acute lymphoblastic leukemia (R/R ALL).Ph-like or BCR-ABL1-like ALL possesses a gene expression profile similar to that of BCR-ABL1 ALL but lacks the BCR-ABL1 fusion protein. It is characterized by increased expression of hematopoietic stem-cell genes, deletion of B-cell lineage genes and kinase-activating alterations. Ph-like ALL is associated with refractoriness to standard induction/consolidation chemotherapy and poor prognosis. Aim: To evaluate the outcomes of pts with R/R Ph-like ALL treated in phase II trial with Ino monotherapy. Methods: We performed an integrated analysis of whole genome sequencing (to identify sequence mutations, structural variations and DNA copy number alterations), and transcriptome sequencing (RNAseq; to quantify gene expression, determine Ph-like gene expression profile and identify fusions) on 53 patients' samples treated with Ino between June 2010 and September 2012. Results: Fifty-three evaluable pts with R/R ALL with stored baseline samples were analyzed. Pts characteristics are summarized in Table 1. Median age was 50 years. Ino was given as Salvage 1, Salvage 2, and Salvage 3 and beyond in 20 (38%), 18 (34%), and 15 (28%) pts, respectively. Figure 1 reflects the different genomic subgroups identified among 53 evaluable pts. Ph-like gene signature was found in 12 pts (22.6%). Among these 12 pts, 6 had IGH-CRLF2, 2 IGH-EPOR, 1 SNX2-ABL1, and 3 had no fusions identified. The overall response rates (ORR) were 54% [complete remission (CR) 20%, CR with partial hematologic recovery (CRh) 32%, and marrow CR (CRi) 2%]. Among pts with morphologic remission, 46% and 82% achieved minimal residual disease (MRD) negativity at CR and at any time, respectively. The ORR for pts with Ph-like ALL, Ph-positive ALL, ALL with KMT2A, and others were 58% (CR=25%; CRh=33%), 42% (CR=8%; CRh=33%), 57% (CR=14%; CRh=29%; CRi=14%), and 56% (CR=26%; CRh=30%), respectively. The respective overall MRD negativity rates were 71%, 100%, 75%, and 83% (Table 1). The median follow-up was 60 months. The median event-free (EFS) and overall survival (OS) were 3.3 and 5.4 months, respectively. There was no difference in EFS and OS between the subgroups analyzed (P=0.464; P=0.824). The median EFS and OS were 4.5 and 4.5 months for pts with Ph-like, 3.1 and 7.2 months for those with Ph-positive ALL, 2.8 and 4.4 months for those with KMT2A, and 2.2 and 4.6 months for others (Table 1). 21 (40%) pts had subsequent allogeneic stem cell transplant; 6 (50%), 3 (25%), 4 (57%), and 8 (36%) in each subgroup, respectively. The rate of VOD was 3 (6%) with no difference among different subgroups. Conclusion: The current analysis suggest that Ino therapy may overcome the impact of Ph-like phenotype in pts with ALL. Confirmation of these findings in a larger cohort and in frontline ALL patients is needed. Disclosures Jabbour: Takeda: Consultancy, Research Funding; BMS: Consultancy, Research Funding; Adaptive: Consultancy, Research Funding; Amgen: Consultancy, Research Funding; AbbVie: Consultancy, Research Funding; Pfizer: Consultancy, Research Funding; Cyclacel LTD: Research Funding. Sasaki:Pfizer: Consultancy; Otsuka: Honoraria. Jain:Precision Biosciences: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Pharmacyclics, an AbbVie company: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Janssen Pharmaceuticals, Inc.: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; Genentech: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; BMS: Research Funding; Adaptive Biotechnologies: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Cellectis: Research Funding; AstraZeneca: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Servier: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Incyte: Research Funding; Pfizer: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; ADC Therapeutics: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Verastem: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; AbbVie: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding. Ravandi:Amgen: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Xencor: Consultancy, Research Funding; Macrogenix: Consultancy, Research Funding; Menarini Ricerche: Research Funding; Selvita: Research Funding; Cyclacel LTD: Research Funding. Short:AstraZeneca: Consultancy; Takeda Oncology: Consultancy, Research Funding; Amgen: Honoraria. Garcia-Manero:Amphivena: Consultancy, Research Funding; Helsinn: Research Funding; Novartis: Research Funding; AbbVie: Research Funding; Celgene: Consultancy, Research Funding; Astex: Consultancy, Research Funding; Onconova: Research Funding; H3 Biomedicine: Research Funding; Merck: Research Funding. Konopleva:Cellectis: Research Funding; Agios: Research Funding; AbbVie: Consultancy, Honoraria, Research Funding; Ascentage: Research Funding; Eli Lilly: Research Funding; Calithera: Research Funding; Stemline Therapeutics: Consultancy, Honoraria, Research Funding; Forty-Seven: Consultancy, Honoraria; Reata Pharmaceuticals: Equity Ownership, Patents & Royalties; Kisoji: Consultancy, Honoraria; Ablynx: Research Funding; Genentech: Honoraria, Research Funding; Amgen: Consultancy, Honoraria; F. Hoffman La-Roche: Consultancy, Honoraria, Research Funding; Astra Zeneca: Research Funding. Mullighan:Illumina: Honoraria, Membership on an entity's Board of Directors or advisory committees, Other: sponsored travel; Pfizer: Honoraria, Other: speaker, sponsored travel, Research Funding; AbbVie: Research Funding; Loxo Oncology: Research Funding; Amgen: Honoraria, Other: speaker, sponsored travel. Kantarjian:Actinium: Honoraria, Membership on an entity's Board of Directors or advisory committees; Agios: Honoraria, Research Funding; Ariad: Research Funding; Novartis: Research Funding; Amgen: Honoraria, Research Funding; Immunogen: Research Funding; AbbVie: Honoraria, Research Funding; Astex: Research Funding; BMS: Research Funding; Cyclacel: Research Funding; Daiichi-Sankyo: Research Funding; Pfizer: Honoraria, Research Funding; Jazz Pharma: Research Funding; Takeda: Honoraria.

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Early MRD-Negativity May Predict for Favorable Outcome Irrespective of Allotransplantation in TKI-Treated Patients with Ph-Positive Acute Lymphoblastic Leukemia

Blood ◽

10.1182/blood.v128.22.1598.1598 ◽

2016 ◽

Vol 128 (22) ◽

pp. 1598-1598

Author(s):

Helena Hohtari ◽

Marjatta Sinisalo ◽

Tapio Nousiainen ◽

Perttu Koskenvesa ◽

Ulla Wartiovaara-Kautto ◽

...

Keyword(s):

Acute Lymphoblastic Leukemia ◽

Board Of Directors ◽

Research Funding ◽

Causes Of Death ◽

Lymphoblastic Leukemia ◽

Advisory Committees ◽

Term Survival ◽

Educational Grant ◽

Treatment Related Mortality ◽

Related Mortality

Abstract Introduction Tyrosine kinase inhibitors (TKIs) such asimatiniband dasatinib have markedly improved treatment results in patients with Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph+ ALL). Almost all patients achieve at least a complete hematological remission with induction therapy consisting of TKImonotherapyor TKI in combination with reduced-intensity chemotherapy and corticosteroids. In eligible patients, allogeneic hematopoietic stem cell transplantation (alloHSCT) has been recommended in first complete remission, but its role inpatientsachieving rapid and deep molecular remissions with TKI-driven therapy is unresolved. Methods We analyzed data fromPh+ ALL patients in the Finnish Hematological Registry (FHR), a population-based database maintained by the Finnish Hematology Association, which includes patients participating in clinical study protocols sponsored by theTheFinnish Leukemia Group, and patients treated outside of clinical trials. The FHR contains detailed information on baseline (demographics, laboratory values,cytogenetics, molecular assays) and follow-up (therapies given and outcome). Minimal residual disease (MRD) was evaluated by standardized RQ-PCR for the bone marrow BCR-ABL1 transcripts with a minimum sensitivity of 10e-5. Therapy responses were coded according to the EuropeanLeukemiaNetguidelines. Data from 128Ph+ALLpatients diagnosed between 1983-2016 were included in the analyses. Survival outcomes were calculated with the Kaplan-Meier method and compared with the log-rank test. Differences between groups were evaluated with the independent samples t-test for parametric numeric variables. Results Of the 128 patients included in the analyses, 78 patients (61%) had received TKI treatment and 50 patients were treated prior the TKI era. The TKIs used wereimatiniband dasatinib and majority of patients concurrently received combination chemotherapy for induction and consolidation. Of the patients not treated with TKIs, 19/50 (38%) received an allotransplant and the overall survival (OS) at 5 years was 58% in the allotransplanted vs. 3% in thenontransplantedpatients (P<0.001). Of the patients treated with TKIs, 45/78 (58%) patients received analloHSCT. The mean age in thealloHSCTgroup was 41 years and in the non-alloHSCTgroup 62 years. OS at 5 years was better in thealloHSCTgroup (62% vs. 48%, P=0.004), but when analyzing causes of death, more deaths due to causes other than leukemia or its treatment were observed in the non-alloHSCTpatients (21% vs. 0 %), related to the competing causes of death in this older group of patients. In addition, there was more treatment-related mortality inalloHSCTpatients (22% vs. 6%). Relapse-free survival did not differ between transplanted and non-transplanted patients at 5 years (73 % vs. 57 %, P=0.42; Figure top panel). In TKI-treated patients, a trend for better OS was observed in patients who were MRD-negative at 3 months (Figure bottom panel). Discussion Our data indicate that up to 50% of patients withPh+ALLexperience long-term survival with TKI-driven therapy and noalloHSCT. However, robust predictive biomarkers are needed for selecting patients in whom the treatment-related mortality and morbidity ofalloHSCTare not warranted and could be treated with TKI-driven therapies only. MRD-negativity at 3 months may select for better outcome, but larger studies are needed for confirmation. In addition, disease-specific genomic andtranscriptomicprofiles (e.g. IKZF1, CDKN2 mutations) andimmunoreconstitutionmay prove valuable in this context. The advent of novel potent MRD-eradicating agents, such asbispecificCD3/CD19 antibodies, may further indicate re-evaluation of the role ofalloHSCTinPh+ALL. Figure 1 Figure 1. Figure 2 Figure 2. Disclosures Mustjoki: Bristol-Myers Squibb: Honoraria, Research Funding; Novartis: Honoraria, Research Funding; Pfizer: Honoraria, Research Funding; Ariad: Research Funding. Säily:Celgene: Other: Educational grant for congress participation; Amgen: Other: Educational grant for congress participation. Remes:Teva: Membership on an entity's Board of Directors or advisory committees; Takeda: Consultancy, Membership on an entity's Board of Directors or advisory committees; Amgen: Membership on an entity's Board of Directors or advisory committees; Janssen-Cilag: Consultancy, Membership on an entity's Board of Directors or advisory committees. Porkka:Celgene: Research Funding.

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Anticoagulation Prophylaxis in Asparaginase-Based Therapy in Adults with Acute Lymphoblastic Leukemia

Blood ◽

10.1182/blood.v128.22.1453.1453 ◽

2016 ◽

Vol 128 (22) ◽

pp. 1453-1453

Author(s):

Hassan Sibai ◽

Umberto Falcone ◽

Arjun Datt Law ◽

Naoko Sakurai ◽

Lalit Saini ◽

...

Keyword(s):

Acute Lymphoblastic Leukemia ◽

Board Of Directors ◽

Research Funding ◽

Low Dose ◽

Lymphoblastic Leukemia ◽

Bleeding Complications ◽

Minor Bleeding ◽

Advisory Committees ◽

Vte Prophylaxis ◽

Prophylaxis Group

Abstract Background: Venous thromboembolism (VTE) is a well-known complication in adults receiving asparaginase (ASNase) based intensification chemotherapy for acute lymphoblastic leukemia (ALL). We previously reported a high VTE rate in patients receiving a modified Dana Farber Cancer Institute (DFCI) intensification phase, which included weekly ASNase. We report thrombosis rates during induction and the results using two different dosing schedules of enoxaparin as primary VTE prophylaxis in adults treated with the same protocol. Methods: We reviewed pts who received induction chemotherapy, without VTE prophylaxis, using DFCI protocol (containing one dose of ASNase) between 2012-2016. Pts achieving complete remission (CR) subsequently received weekly ASNase-based modified DFCI intensification phase for at least 7 cycles (21 weeks) with VTE prophylaxis, using two dosing schedules in consecutive cohorts: A. Low-dose group received enoxaparin 40 mg subcutaneously (SC) daily for patients weighing < 80 kg and 60 mg daily for those ≥ 80 kg; B. Dose-escalated group received enoxaparin 1 mg/kg SC daily (rounded to the nearest 20 mg). VTE rates were calculated for pts during induction and intensification phase (low-dose and escalated dose prophylaxis). Results were compared to a similar group of 99 pts previously treated with the same DFCI protocol who did not receive VTE prophylaxis during intensification. Patients not achieving CR, relapsing, undergoing alloSCT after induction, not completing at least 21 weeks of intensification phase or developing VTE before induction were not included. Results: The VTE rate during induction (n-=144) was 2.8%. Of 111 pts who received intensification prophylaxis, the overall VTE rate was 19.8% (p<0.001 compared to induction). Of 41 patients who received low-dose prophylaxis, the VTE rate was 26.8%, while the VTE rate in the dose-escalated prophylaxis group was 15.7%. This compared to a 27.3% rate in the historical non-prophylaxis group (Table 1). There was no significant difference among intensification groups (no prophylaxis, low-dose, and dose-escalated) with respect to median age, gender, weight and number of treatment cycles. The actual mean dose of enoxaparin in the low-dose prophylaxis group was 0.62 mg/kg, as compared to 0.90 mg/kg in the dose-escalated group. There were no major bleeding complications observed in the prophylaxis groups. The minor bleeding rate in the entire prophylaxis cohort was 4.5% (5/111), and was similar between the low-dose and escalated dose groups. Sites of VTE in the prophylaxis groups included lower extremity (11 cases), sagittal sinus (3), subclavian line related (5), pulmonary embolism (9), and cardiac thrombus (1); some patients had more than one site involved. Conclusions: Our data confirmed a high VTE rate during intensification, even with prophylaxis. Dose-escalation of enoxaparin to 1 mg/kg was safe with a trend toward reduction in VTE rates, particularly in patients weighing > 80 kg; however, a larger cohort would be needed to determine if this difference is significant. The use of novel anticoagulants in this setting could be considered. Disclosures Schuh: Amgen: Membership on an entity's Board of Directors or advisory committees. Yee:Novartis Canada: Membership on an entity's Board of Directors or advisory committees, Research Funding. Gupta:Novartis: Consultancy, Honoraria, Research Funding; Incyte Corporation: Consultancy, Research Funding. Schimmer:Novartis: Honoraria.

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